Lights aren't working with the toon shader or casting shadows. They used to. I really hope this is a bug and not an intentional change. Note that in the main screen shot, I set the self illumination to about 50% for all materials, like I always do for cleaner toon shadows. Without the self illumination change it would be solid black, as in, no light. Using IBL or ambient occlusion works with the toon shader, and they add some 3D lighting/illumination, but that does not make the result look like a 2D cartoon at all. I largely used the toon shader in iclone 5, sometimes rendering larger scenes in iclone 6 and 7, but it's been awhile since I experimented with the toon shader in iclone 8, and now this is happening.